Спутник ДЗЗ. DESDynI. [Редактировать]

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Найдено 239 документов по запросу «DESDynI». [Перейти к поиску]


Дата загрузки: 2016-11-23
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0.33/5
DESDynI Lidar for Solid Earth Applications ...-As part of the NASA's DESDynI mission, global elevation profiles from... the primary objective of the DESDyni-Lidar is the recovery of... the moderate resolution multi-beam DESDynI-Lidar into processing of SAR... an excellent setting for testing DESDyni capabilities to recover fundamental parameters... DESDyni-Lidar calculated ground tracks (Fig. 1). We used a single pass of DESDynI... terrace surfaces (I·IV) and the DESDynI-Lidar (NE-SW) ground tracks... laser energy, we generated pseudo-DESDynI waveforms from the last return... of even the medium footprint DESDynI-Lidar data over the standard... the Sullivan anticline. Additionally, the DESDynI-Lidar derived elevation profiles will... images. A. Centroid elevations along jive DESDynI-Lidar ground tracks The centroid... waveform has been simulated assuming DESDynI-like parameters for the observations... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks (Fig. 1). The... Bay. The significance of the DESDynI-Udar simulations is that surface... hard to discern in the DESDynI-Udar elevation profiles. B. Future steps... the terraces To simulate the DESDynI-Lidar waveforms from aircraft point... systems such as LVIS and DESDynI-Lidar is that is it... EARTHQUAKE As summarized in the DESDynI Science Definition Document, "in areas... above, we simulated waveforms along DESDynI-Lidar ground tracks over the... great earthquakes with just one DESDynI-Udar pass assuming a 5 laser beam...-earthquake DEM along with the DESDynI Udar over the region. Alternatively... Report of the DESDynI Applications Workshop [11]. V. SUMMARY Since DESDynI-Lidar would...-slip event in southern Alaska, DESDynI-Udar could provide new and... off-nadir pointing to previous DESDynI-Udar transects. We have found... Lidar as part of the DESDynI mission. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah... Structure, and Dynamics of Ice (DESDynI), A NASA Mission in the NRC..., and J. Rundle, Report of the DESDynI Application Workshop, 2009. 4



Дата загрузки: 2016-11-23
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0.23/5
DESDYNI LIDAR FOR SOLID EARTH APPLICATIONS J.... the primary objective of the DESDynI-Lidar is recovery of the... earlier study we generated pseudo DESDynI waveforms with high correlation (Figure... point cloud data to generate a DESDynI like waveforms and a modified post... an excellent setting for testing DESDynI capabilities to recover fundamental parameters... optimum orientation for future roughly N-S DESDynI-Lidar ground tracks. The terraces... the NCALM data along the DESDynI-Lidar calculated ground tracks. An... EARTHQUAKE As summarized in the DESDynI Science Definition Document, “in areas.... Here we simulated waveforms along DESDynI-Lidar ground tracks before and... “after” waveforms. For the future DESDynI -Lidar acquisitions, we will need... Report of the DESDynI Applications Workshop11. 5. SUMMARY Since DESDynI-Lidar would penetrate...-slip event in southern Alaska, DESDynI-Lidar could provide new and... some offnadir pointing to previous DESDynI-Lidar transects. We have found... Lidar as part of the DESDynI mission. 6. REFERENCES [1] J.B. Blair, J. Ranson, R. Dubayah...]DESDynI Science Study Group, Deformation, Ecosystem Structure, and Dynamics of Ice (DESDynI..., and J. Rundle, Report of the DESDynI Application Workshop, 2009.



Дата загрузки: 2016-11-23
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0.2/5
PolInSAR Methods For Ecosystem Science 2011 Carbon Cycle & Ecosystems Joint Meeting 1 Introduction & Motivation !!Ecosystem structure scientists (especially on ESWG) exposed frequently to PolInSAR via DESDynI !!Considerable uncertainty about efficacy of PolInSAR led to no ecosystem requirements on the InSAR segment of previous DESDynI mission !! !! !! !! Lack of US ecosystem community experience with polInSAR Lack of peer-reviewed papers Lack of access to airborne and field data sets to assess utility Great worry over temporal decorrelation 2 Introduction & Motivation !!DESDynI Science Steering Group (DSSG) and broader ESWG recognized the potential of PolInSAR !! Terrestrial Ecology funded exploration of algorithm development and field experiments (UAVSAR/LVIS joint deployments). !!Discussion about a potential joint PolInSAR mission with DLR (TANDEM-L) with previous DESDynI mission !! Development of draft science requirements !! Draft statement from AGU 2010 meeting "! “The Ecosystem Structure team strongly supports the pursuit of Tandem-L in the DESDynI Project” 3 Introduction & Motivation !!Cancellation of DESDynI lidar unfortunate and helped motivate the present meeting !! “Our community’s options for structural measurements in the near!! term have been much constrained during the past year, and we need to be able to understand and assess our remaining options.” Community examining potential/efficacy of ICESAT2 for vegetation structure -> great uncertainty !!Progress on potential joint missions (e.g. BIOMASS & TANDEML) predicated on mutual understanding and comprehension !!Joint science meeting is long overdue !! Potential joint experiment would be be exceptionally useful !!First step in all these activities is exposure of US ecosystem community to potential of PolInSAR 4 NASA’s Proposed DESDynI* Mission Radar designs for proposed DESDynI mission being studied in pre-Phase A TDRSS downlink L-band 5-80 MHz BW Quad-pol Radar 9-15 m mesh reflector 12-24 element transmit and receive array 12-24 dual-pol receive channels 180-360 km swath, full res, full-pol Better than -25 dB NES0 at 20 MHz BW !"#$"%&'()("*+,-./0,&1(#2,3%34*.($4-5245-*1(/&6("%&/.723(,+('2*( Pre-decisional – for Planning and Discussion Purposes Only! January 2011 MCR DESDynI Concept Must be re-thought Due to Current OMB Direction L-band Polarimetric SAR ? Ecosystem Structure Canopy Height! Biomass! Biomass, Vegetation Structure, Effects of changing climate on habitats and CO2,, disturbance ? ? ? Multibeam Profiling LIDAR Cryosphere Ice velocity, thickness Response of ice sheets to climate change & sea level rise L-band Repeat Pass InSAR Solid Earth Surface Deformation Geo-Hazards Water Resource Management 91-day repeat ~370 km orbit 25 m spot 5 beams Pass 1 Pass 2 Two spacecraft not at same scale ? 13 day repeat ?~600 km orbit 250-500 m orbit control ? 220 km swath Full resolution over swath MHz modes ? 5,20+5,40,80 SP, DP, QQP, QP modes 3 -6 Outlook for DESDynI •! President’s FY12 Budget Proposal (February 2011) reset the go- forward plan for DESDynI –! Lidar mission to be contributed, not funded by NASA –! Radar mission to be implemented more affordably •! NASA continues to invest in DESDynI –! Forming a Science Definition Team –! Continuing trade studies at JPL •! NASA is currently exploring options for reducing cost –! Reducing number and scope of science requirements levied on DESDynI ! DESDynI in combination with other satellites to approach DESDynI requirements –! Find international partners interested in the science and technology ! Ongoing Tandem-L studies with DLR ! Ongoing discussions with several potential partners –! Find domestic partners that would increase utility of DESDynI data 7 Possibilities with PolInSAR – an SRTM analogy •! Prior to SRTM, most users were familiar with quality and character of topography derived from optical stereo •! Despite a concerted effort, attempts to produce uniform high-quality global topography were unsuccessful •! SRTM was selected as a practical alternative to previously attempted methods to fill the gap in global topography –! Sponsors recognized that the data characteristics would be different from optical stereo •! SRTM is now a widely used data sets for science and applications –! Some of its unique qualities (e.g. “electrical height”) are being exploited for canopy height and biomass studies •! Similarly, PolInSAR may be able to fill a gap in global estimates of above-ground biomass and forest structure •! PolInSAR is an extension of SRTM techniques, estimating a number of heights in the canopy to infer structure. 8



Дата загрузки: 2017-02-23
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0.06/5
... the earthquake cycle GPS InSAR (DESDynI) Geophysical Sensor Web Portlet Summary... Database Interferogram Fault Data 20 DESDynI Mission Deformation, Ecosystem Structure, and...-height accuracy of 1 m Observation Techniques DESDynI is defined by the decadal... is on Deformation Objectives for DESDynI Determine the likelihood of earthquakes... modes High data volumes for DESDynI drive new paradigm for data... QuakeSim to DESDynI Mission Design Measurement Requirements Validate that DESDynI will meet the science objectives Assess the quality of DESDynI... sensitivity analysis Data Volume for DESDynI DESDynI data volume is an order... Expansion factor is 5.2 for all DESDynI data products Processed data 29... Can Serve as Prototype for DESDynI Data Processing We are deploying... operational TeraGrid Supercomputing Resources 30 DESDynI Deformation Data Analysis QuakeSim integrates... Will provide computational infrastructure for DESDynI data analysis and interpretation GeoFEST... End-to-End Flow Data DESDynI InSAR Data HPC Processing Center... deformation InSAR portion of the DESDynI mission Developing Grid services with...



Дата загрузки: 2016-11-23
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0.29/5
... Radar Processing Concepts for the DESDynI Mission Yunling Lou, Steve Chien... June, 2010 Arlington, Virginia 1 Agenda •  DESDynI mission measurements overview •  Benefits of... of onboard products •  Future work 2 DESDynI Mission Measurements Overview Polarimetric SAR... Repeat Pass InSAR Pass 2 Pass 1 DESDynI will exploit an L-band polarimetric... Dynamics Changes in Earth’s Surface DESDynI ‐ Deforma/on, Ecosystem Structure, and... Advantages of Onboard Processing for DESDynI Mission   DESDynI Radar is an L-band... of Onboard Processing Technology for DESDynI Mission Solid Earth Desired Repeat... for DESDynI Mission’s Radar Instrument Onboard Processor Onboard Autonomy Software DESDynI Analyze...



Дата загрузки: 2017-06-16
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... (1999) MISR (1999) GRACE (2002) DESDynI (TBD) Ocean Vector Winds GEO... for RF Hybrids Hoffman, Jim P. DESDynI A Large High-Precision Deployable Reflector... Fung, Andy ACE Hoffman, Jim DESDynI Kuhnert, Andreas Next-Gen Spectrometers..., Andrea DESDynI Onboard processing and autonomous data acquisition for the DESDynI mission Lou, Yunling DESDynI OSCAR: Online Services... Radar Paul Von Allmen, Paul DESDynI On-Board Processing to Optimize... Scientific Computing Environment Rosen, Paul DESDynI Moving Objects Database Technology for... Measurement Mission Support Webb, Frank DESDynI Multivariate Data Fusion and Uncertainty... DESDynI Advanced Rapid Imaging & Analysis for Monitoring Hazards Hook Hua, Hook DESDynI... Research and Application Kedar, Sharon DESDynI Integration of the NASA CAMVis...



Дата загрузки: 2017-06-14
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... become available with NASA’s planned DESDynI sensor. However, substantial challenges remain... Structure, and Dynamics of Ice (DESDynI), http://desdyni.jpl.nasa. gov/ [Donnellan... globe. The mission concept for DESDynI envisions a combination of LiDAR sensors... the transects that ICESAT and DESDynI data are, or will be... expected from a spaceborne mission, like DESDynI. The question is if the... systems, such as the proposed DESDynI sensor, thus have the potential... active remote sensors, such as DESDynI. The resolutions at which these... the sensor used (LiDAR, Landsat, DESDynI, etc.), our study highlights the... structure, and dynamics of ice (DESDynI), in Proceedings of IEEE Aerospace...



Дата загрузки: 2017-06-16
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0.29/5
... of InSAR. Until the NASA DESDynI mission is operational at the... rapidly when the proposed NASA DESDynI mission is realized. Recognizing this... new data to come from DESDynI. With DESDynI and other new spaceborne... be able to incorporate future DESDynI SAR metadata thereby making data... of discovery and access to DESDynI SAR data. These data address... and distribute data from the DESDynI mission. The proposed work will... data from all missions including DESDynI. This project enables new information... Community. The goal of the DESDynI mission is to serve both... discussed at the October, 2008 DESDynI Applications Workshop in Sacramento, CA... a broader community. Future missions like DESDynI can be expected to follow...



Дата загрузки: 2017-06-15
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... expand as missions such as DESDynI are launched. The goal of... and when the proposed NASA DESDynI mission is realized. With these... areas. As the proposed NASA DESDynI will also be L-band, experiences... will be very valuable to DESDynI system development. Figure 3. Vertical deformation... be able to incorporate future DESDynI SAR metadata thereby making data... of discovery and access to DESDynI SAR data. These data address... and distribute data from the DESDynI mission. The proposed work will... data from all missions including DESDynI. This project enables new information... to meet mission schedules The DESDynI mission launch date is officially... from new missions such as DESDynI. We will co-develop the...



Дата загрузки: 2017-03-18
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0.09/5
... Structure, and Dynamics of Ice (DESDynI) Radar satellite. Two climate-focused... will be completed for the DESDynI mission, with the NASA effort... for the Lidar element. The DESDynI launch date will be determined...-B and initiate the spacecraft contract; - DESDynI will complete its Phase A formulation... 2016, respectively. A third Tier I mission, DESDynI, will complete its pre-formulation...-2. The launch plans for the DESDynI mission will be informed by...) and complete its confirmation review; - DESDynI will complete its pre-Phase... Structure, and Dynamics of Ice (DESDynI) The DESDynI mission is a Tier-1 decadal... two separate spacecraft. The overall DESDynI radar/lidar mission will greatly... pre-formulation activities for the DESDynI mission, with the studies focused... manages OSTM, ACRIMSat, SMAP, QuikSCAT, DESDynI, CLARREO, and Jason. Project Management... TBD ICESat-2 GSFC GSFC TBD DESDynI JPL JPL, GSFC TBD CLARREO...